The password to use to connect to the database
This can be omitted if the password is baked into the url ( See Sql Server for an example), or if password is provided through another means.
This configuration parameter will only be used in the command line version of MigrateDB.
./migratedb -password=mysecretpassword info
migratedb.password=mysecretpassword
MIGRATEDB_PASSWORD=mysecretpassword